Tests failing on tvos with "The app 'net.dot.System.Runtime.Tests' terminated with signal 11"

[jkotas]

Build Information

Build: https://dev.azure.com/dnceng-public/cbb18261-c48f-4abb-8651-8cdcb5474649/_build/results?buildId=1282321
Build error leg or test failing: System.Runtime.Tests.WorkItemExecution
Pull request: #124049

Error Message

Fill the error message using step by step known issues guidance.

{
  "ErrorMessage": "The app 'net.dot.System.Runtime.Tests' terminated with signal 11",
  "ErrorPattern": "",
  "BuildRetry": false,
  "ExcludeConsoleLog": false
}

Known issue validation

Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1282321
Error message validated: [The app 'net.dot.System.Runtime.Tests' terminated with signal 11]
Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 2/6/2026 5:55:42 AM UTC

Report

Build	Definition	Test	Pull Request
1329309	dotnet/runtime	System.Runtime.Tests.WorkItemExecution	#125416
1327497	dotnet/runtime	System.Runtime.Tests.WorkItemExecution	#125350
1314009	dotnet/runtime	System.Runtime.Tests.WorkItemExecution	#124920

Summary

24-Hour Hit Count	7-Day Hit Count	1-Month Count
0	1	3

[MihuBot]

I'm a bot. Here is a possible related and/or duplicate issue (I may be wrong):

• [tvOS] System.Runtime.Tests APP_CRASH on tvOS device during test execution #124069

[hoyosjs]

cc @rcj1

[rcj1]

#124044

[jkotas]

#124044

This test is disabled. It is still failing even after the test got disabled.

[dotnet-policy-service]

Tagging subscribers to 'os-tvos': @vitek-karas, @kotlarmilos, @steveisok, @akoeplinger
See info in area-owners.md if you want to be subscribed.

[kotlarmilos]

I think this might be related to the test logic in xunit. Per your comment, the test was already disabled, so I doubt that the PR you merged had an effect. I created a new PR #124076 to probe disabling runtime async on Apple mobile since the failure is happening in System.Runtime.Tests.

The crash dump for App terminated due to signal is uploaded in the artifacts as an .ips file and could be parsed using Xcode.

[AraHaan]

Also happened in #123601.

[kotlarmilos]

Yes, the PR #124076 mitigates it.